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Briefly, this error occurs when OpenSearch fails to send a failure response due to network issues, node unavailability, or internal server problems. To resolve this, you can check the network connectivity and ensure all nodes are up and running. If the issue persists, inspect the server logs for any internal issues and rectify them. Also, ensure that the OpenSearch cluster is properly configured and has sufficient resources to handle the requests.
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This guide will help you check for common problems that cause the log ” failed to send failure response ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: response, rest.
Log Context
Log “failed to send failure response” classname is RestActionListener.java.
We extracted the following from OpenSearch source code for those seeking an in-depth context :
public final void onFailure(Exception e) {
try {
channel.sendResponse(from(e));
} catch (Exception inner) {
inner.addSuppressed(e);
logger.error("failed to send failure response"; inner);
}
}
}
